Surname Ranzani (Ranzani 
) , throughout the world, is quite a rare cognomen. The cognomen Ranzani is habitual in Italy, where it is quite a rare surname, Brazil, where it is a rare surname, and Argentina. Very seldom, Ranzani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ranzani | Brazil, Italy, Argentina, United States, Indonesia |
| camillo ranzani Italian priest and naturalist (1775–1841), IT (b. 1775) |
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| roberto ranzani Italian association football player (1942-2016), IT (b. 1942) |
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| paolo ranzani Italian photographer, IT (b. 1966) |
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| andré ranzani (b. 1962) |
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| raffaele ranzani researcher |
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| otavio t. ranzani researcher |
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| guglielmina n ranzani researcher |
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| t. ranzani researcher, US |
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| americo tavares ranzani researcher (ORCID 0000-0002-6203-9467) |
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| leonardo ranzani researcher |
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| valeria ranzani researcher |
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| alice ranzani researcher |
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| ermanno ranzani |
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| marco ranzani (b. 1982) |
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Mr, Caio, Cris, Beta, Ranz, Rafa, Raul, Rosa, Roza, Rene, Rita, Desi, Dina, Dino, Dora, Gian, Gino, Lara, Lais, Liza, Luca, Luis, Asia, Amã, Anna, Aldo, Ms, Lu, Mã, Sã, Ana, Kim, Rui, Ruy, Lia, Lã, Luiz, Eng, Eva, Isa, Ivo, Ida, Ugo, Mary, Mara, Mila, Sara, Alba, Eni, and Jayr